I just read as of June 2009 that the fee you agreed on is no more than 25 percent of past-due benefits or $6,000 whichever is less.
If we do not approve the fee agreement, we will notify you and your representative in writing that your representative must file a fee petition.
Your representative can charge you out-of-pocket expenses. such as medical reports, without our approval.
To read more go to www.socialsecurity.gov.